HABIT Perennial. Culms erect (2), or geniculately ascending (1), or decumbent (2); 4-30.66-50 cm long. Ligule an eciliate membrane. INFLORESCENCE Inflorescence a panicle. Panicle spiciform. Panicle axis bearing deciduous spikelet clusters. Spikelets in pairs. Fertile spikelets pedicelled; 2 in the cluster. Pedicels fused to each other; linear. FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; laterally compressed; 3.5-3.75-4 mm long; falling entire; deciduous in a cluster with fused pedicels. GLUMES Glumes shorter than spikelet; thinner than fertile lemma. Lower glume oblong; 1 length of upper glume; membranous; without keels; 2 -veined. Lower glume apex awned. Upper glume oblong; 0.5 length of adjacent fertile lemma; membranous; 1-keeled; 1 -veined. Upper glume awned; 1 -awned. FLORETS Fertile lemma elliptic; chartaceous; keeled; 3 -veined. Lemma margins ciliate. Lemma apex acuminate; awned; 1 -awned. Palea 2 -veined. Palea keels ciliate. FLOWER Anthers 3. FRUIT Caryopsis with adherent pericarp; fusiform. DISTRIBUTION North America, or South America.